proposal #2254: have Control.Arrow re-export (>>>) and (<<<)

[Ross Paterson]

On Wed, Apr 30, 2008 at 04:55:47PM -0700, Don Stewart wrote:
> ross:
> > A previous proposal:
> > 
> > 	http://hackage.haskell.org/trac/ghc/ticket/1773
> > 
> > split the Arrow class, making (>>>) and (<<<) functions in
> > Control.Category.  This breaks programs that use Control.Arrow.
> > 
> > To avoid some of the breakage, the proposal is that Control.Arrow should
> > re-export (>>>) and (<<<), imported from Control.Category.
> 
> This patch has been applied (xmonad was broken due to the change, so I
> thought it best to act).

I thought we had a process for API changes.

I'm not sure what the right thing is here.  I usually prefer to avoid
re-exports because they create problems with warnings.